Some changes are coming to the United States Post Office (USPS) starting tomorrow (FRI).

The USPS is implementing new service standards for First-Class Mail and periodicals in an effort to increase delivery reliability, consistency and efficiency for customers. As a result, time-in-transit standards will increase by 1 or 2 days for certain mail that is traveling longer distances. The USPS says most First-Class Mail and periodicals will be unaffected by the changes. However, postal officials are encouraging customers to plan ahead–and if sending mail long distance–mail it early